Messages in this thread | | | Date | Sun, 10 Mar 2013 23:29:49 -0700 | Subject | Re: [PATCH v2 20/20] x86, mm, numa: Put pagetable on local node ram for 64bit | From | Yinghai Lu <> |
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On Sun, Mar 10, 2013 at 10:49 PM, Tang Chen <tangchen@cn.fujitsu.com> wrote: > On 03/10/2013 02:44 PM, Yinghai Lu wrote: >> >> Calling init_mem_mapping in early_initmem_init for every node. >> alloc_low_pages will alloc page table in following order: >> BRK, local node, low range >> So page table will be on low range or local nodes. ... > IIUC, we call init_mem_mapping() for each node ranges. In the first time, > local_max_pfn_mapped = begin >> PAGE_SHIFT; > local_min_pfn_mapped = real_end >> PAGE_SHIFT; > which means > local_min_pfn_mapped >= local_max_pfn_mapped > right ? > > So, the first page allocated by alloc_low_pages() is not on local node, > right ?
It is from BRK with kernel code.
> Furthermore, the first page of pagetable is not on local node, right ?
It is in BRK for node with start = 0.
Other node, it is from low_range aka node with start = 0.
Thanks
Yinghai
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